Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tra kha con snippets" » "tra khao con snippets", "tra ha con snippets", "tran khoa con snippets", "tra khi con snippets", "tra khoa cong snippets", "tra khau cong snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("tra kha con snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("tra kha con snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tra kha con snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tra kha con snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.